Improved paying-off pulley

The invention relates to an improved paying-off pulley, belonging to a tight line putting construction implement of an electric power circuit, which comprises a pulley and a pulley runway, wherein one end of the pulley runway is hinged on a telescopic upstand installed and fixed on a pole; and the other end of the telescopic supporting frame used for being hinged on the angle steel cross arm of the pole is hinged with the pulley runway. The invention has the advantages of convenient paying-off operation, safety and reliability.